ipv6: remove unnecessary sysSockoptLen type

Change-Id: I87887ea03c36ca7d26e1ab2cb55d723611c942a8
Reviewed-on: https://go-review.googlesource.com/21354
Reviewed-by: Ian Lance Taylor <iant@golang.org>

ipv6/sockopt_ssmreq_unix.go

@@ -21,7 +21,7 @@ func setsockoptGroupReq(fd int, opt *sockOpt, ifi *net.Interface, grp net.IP) er
 	}
 	gr.setGroup(grp)
 	var p unsafe.Pointer
-	var l sysSockoptLen
+	var l uint32
 	if freebsd32o64 {
 		var d [sysSizeofGroupReq + 4]byte
 		s := (*[sysSizeofGroupReq]byte)(unsafe.Pointer(&gr))
@@ -43,7 +43,7 @@ func setsockoptGroupSourceReq(fd int, opt *sockOpt, ifi *net.Interface, grp, src
 	}
 	gsr.setSourceGroup(grp, src)
 	var p unsafe.Pointer
-	var l sysSockoptLen
+	var l uint32
 	if freebsd32o64 {
 		var d [sysSizeofGroupSourceReq + 4]byte
 		s := (*[sysSizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))

ipv6/sockopt_unix.go

@@ -17,7 +17,7 @@ func getInt(fd int, opt *sockOpt) (int, error) {
 		return 0, errOpNoSupport
 	}
 	var i int32
-	l := sysSockoptLen(4)
+	l := uint32(4)
 	if err := getsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), &l); err != nil {
 		return 0, os.NewSyscallError("getsockopt", err)
 	}
@@ -29,7 +29,7 @@ func setInt(fd int, opt *sockOpt, v int) error {
 		return errOpNoSupport
 	}
 	i := int32(v)
-	return os.NewSyscallError("setsockopt", setsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), sysSockoptLen(4)))
+	return os.NewSyscallError("setsockopt", setsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), 4))
 }
 
 func getInterface(fd int, opt *sockOpt) (*net.Interface, error) {
@@ -37,7 +37,7 @@ func getInterface(fd int, opt *sockOpt) (*net.Interface, error) {
 		return nil, errOpNoSupport
 	}
 	var i int32
-	l := sysSockoptLen(4)
+	l := uint32(4)
 	if err := getsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), &l); err != nil {
 		return nil, os.NewSyscallError("getsockopt", err)
 	}
@@ -59,7 +59,7 @@ func setInterface(fd int, opt *sockOpt, ifi *net.Interface) error {
 	if ifi != nil {
 		i = int32(ifi.Index)
 	}
-	return os.NewSyscallError("setsockopt", setsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), sysSockoptLen(4)))
+	return os.NewSyscallError("setsockopt", setsockopt(fd, opt.level, opt.name, unsafe.Pointer(&i), 4))
 }
 
 func getICMPFilter(fd int, opt *sockOpt) (*ICMPFilter, error) {
@@ -67,7 +67,7 @@ func getICMPFilter(fd int, opt *sockOpt) (*ICMPFilter, error) {
 		return nil, errOpNoSupport
 	}
 	var f ICMPFilter
-	l := sysSockoptLen(sysSizeofICMPv6Filter)
+	l := uint32(sysSizeofICMPv6Filter)
 	if err := getsockopt(fd, opt.level, opt.name, unsafe.Pointer(&f.sysICMPv6Filter), &l); err != nil {
 		return nil, os.NewSyscallError("getsockopt", err)
 	}
@@ -86,7 +86,7 @@ func getMTUInfo(fd int, opt *sockOpt) (*net.Interface, int, error) {
 		return nil, 0, errOpNoSupport
 	}
 	var mi sysIPv6Mtuinfo
-	l := sysSockoptLen(sysSizeofIPv6Mtuinfo)
+	l := uint32(sysSizeofIPv6Mtuinfo)
 	if err := getsockopt(fd, opt.level, opt.name, unsafe.Pointer(&mi), &l); err != nil {
 		return nil, 0, os.NewSyscallError("getsockopt", err)
 	}

ipv6/sys_bsd.go

@@ -13,8 +13,6 @@ import (
 	"golang.org/x/net/internal/iana"
 )
 
-type sysSockoptLen int32
-
 var (
 	ctlOpts = [ctlMax]ctlOpt{
 		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},

ipv6/sys_darwin.go

@@ -12,8 +12,6 @@ import (
 	"golang.org/x/net/internal/iana"
 )
 
-type sysSockoptLen int32
-
 var (
 	ctlOpts = [ctlMax]ctlOpt{
 		ctlHopLimit:   {sysIPV6_2292HOPLIMIT, 4, marshal2292HopLimit, parseHopLimit},

ipv6/sys_freebsd.go

@@ -14,8 +14,6 @@ import (
 	"golang.org/x/net/internal/iana"
 )
 
-type sysSockoptLen int32
-
 var (
 	ctlOpts = [ctlMax]ctlOpt{
 		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},

ipv6/sys_linux.go

@@ -12,8 +12,6 @@ import (
 	"golang.org/x/net/internal/iana"
 )
 
-type sysSockoptLen int32
-
 var (
 	ctlOpts = [ctlMax]ctlOpt{
 		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},

ipv6/sys_stub.go

@@ -6,8 +6,6 @@
 
 package ipv6
 
-type sysSockoptLen int32
-
 var (
 	ctlOpts = [ctlMax]ctlOpt{}
 

ipv6/syscall_linux_386.go

@@ -16,14 +16,14 @@ const (
 
 func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (int, syscall.Errno)
 
-func getsockopt(fd, level, name int, v unsafe.Pointer, l *sysSockoptLen) error {
+func getsockopt(fd, level, name int, v unsafe.Pointer, l *uint32) error {
 	if _, errno := socketcall(sysGETSOCKOPT, uintptr(fd), uintptr(level), uintptr(name), uintptr(v), uintptr(unsafe.Pointer(l)), 0); errno != 0 {
 		return error(errno)
 	}
 	return nil
 }
 
-func setsockopt(fd, level, name int, v unsafe.Pointer, l sysSockoptLen) error {
+func setsockopt(fd, level, name int, v unsafe.Pointer, l uint32) error {
 	if _, errno := socketcall(sysSETSOCKOPT, uintptr(fd), uintptr(level), uintptr(name), uintptr(v), uintptr(l), 0); errno != 0 {
 		return error(errno)
 	}

ipv6/syscall_unix.go

@@ -11,14 +11,14 @@ import (
 	"unsafe"
 )
 
-func getsockopt(fd, level, name int, v unsafe.Pointer, l *sysSockoptLen) error {
+func getsockopt(fd, level, name int, v unsafe.Pointer, l *uint32) error {
 	if _, _, errno := syscall.Syscall6(syscall.SYS_GETSOCKOPT, uintptr(fd), uintptr(level), uintptr(name), uintptr(v), uintptr(unsafe.Pointer(l)), 0); errno != 0 {
 		return error(errno)
 	}
 	return nil
 }
 
-func setsockopt(fd, level, name int, v unsafe.Pointer, l sysSockoptLen) error {
+func setsockopt(fd, level, name int, v unsafe.Pointer, l uint32) error {
 	if _, _, errno := syscall.Syscall6(syscall.SYS_SETSOCKOPT, uintptr(fd), uintptr(level), uintptr(name), uintptr(v), uintptr(l), 0); errno != 0 {
 		return error(errno)
 	}